Lock



Feb. 19, 1935. N, B, HURD 1,992,124

LOCK

Filed Dec. 15, 1928 'NVENTOR Q ATTORNEY$ Patented Feb. 19, 19 35 PAT EN-T FIOFFICE" Lock Norman B. Hurd, New Britain, Conn, assignor to The American Hardware Corporation, New Britain, Conn., a corporation of Connecticut Application December 1 5, 1928, Serial No. 326,206

17 Claims.

This invention relates to looks and latches, particularly of, the type in which a keymechanism, such as a pin cylinder lock, is used-within one of the knobs to turn a lock and/or'latch operating spindle, which passes inwardly through the knob shank. It is of further importance in connection with such locks and latches as embody mechanism mounted on and cooperating with the knob shank. The invention primarily resides in a construction which permits the cylinder lock mechanism contained within the knob to be quick- 'ly and easily removed by a'mechanic, not necessarily skilled in the lock art, so that another cylinder, adapted to be operated by a different key, may be substituted. In most locks of the type referred to, to substitute one cylinder for another within the knob mechanism involves not only considerable labor, but also requires a skilled mechanic. My present invention is of importance in that it reduces substantially the time required to change the cylinder, and also obviates the necessity of employing a lock expert for that purpose. The purpose ofthis invention 'may be better understood when'itis appreciated that in large apartments and'office buildings, wherein a great number of such locks are employed, the occupants "of .the apartments and ofiices are frequently changed, sothat it becomes necessary to provide each new tenant with a different key. The present invention .permitsithis to be easily and quickly done without disturbing the main lockmechanism inthe slightest and without even opening the door on which the lock is mounted. f

In the present invention, the knob rand knob shank construction are such that the knob, or a portion thereof, may be detached fromthe shank without disturbing the position "of the latter, "whereby, when this is'done, an entirely new cylinder lock element may be quickly'and easily substituted for the old one.

In the'form shown herein the removable knob portion is locked to and unlocked from the balance of the knob by means of a special key, which 'may be kept by the one 'in charge of the building containingthe 'ofiices or apartments. 1 In the accompanying drawing, which shows my invention inone of its preferred'forms T V Fig. 1 is, in the main, a'long'itudinal section of 'a knob and associated parts, constructed tofembody my invention; l

r Fig. 2 is an end'view of enact the parts;

Fig. 3 is an end view of other parts, partially assembled; Fig. '4'is an end view of anotherdetail; Fig. 5 is a section similar to Fig. 1, but showing certain parts in a different position and also showing a difierent key from that illustrated in Fi 1;

Fig. 6 is a detail view in longitudinal section, on a plane at right angles to that of Fig.5;

Fig. 7 is a perspective view of another detail.

. 1 represents a knob shank, having a flange 1 which, in the form shown, constitutes apart of the knob. 2 is the other part of the knob, which is arranged to slide longitudinally. onto thepart .1 forming a cavity therein, in whichis located acylinder lock 3, the outer end .of the cylinder lock being accessible at the central outer end of the knob, so that a key 4 may be inserted. to operate the pin tumblers, whereby the .plug 5 of the cylinder lock may be turnedto rotate the usual spindlefi, secured to the inner end of the plug, in any suitable manner and by which" any appropriate lock and/or latch mechanism (not shown) may be actuated. The knob'shank is, of course,'borne in its usual manner in any suitable lock mechanism, the construction of which. is not essential to this invention, and hence is not shown. It will be observed that the key 4 operates all the pin tumblers excepting theinnermost one, this latter being employed fora special purpose. When the key 4 is in place the plug 5 may be turned to rotate the spindle 6.

p 7- 7 are two posts or studs, which 'aremounted within-the knob section 2, while within the section 1 thereare two bores or cavities, indicated at 88, designed to snugly receive the studs 7-7. Each stud 7 7- is notched or annularlygrooved, as best seen in Fig.6, at 9, so as to forms-1. lockingl'shoulder, whereby when the knob sections l -2 are-fully seated, a locking device may be actuated to engage in the notch portions 9 of the studs 7, so as to prevent the separation of the knob portions v1"=2. In the form shown herein thislocking means comprises a plate 10, having I "a hub sleevell for receiving the inner end of the plug 5. This locking plate has what I may term two locking ears 10=-10 (Fig. 7) and when the plate 10 stands in the position shown in Figs. '3 and 6, it will be seen that these cars 10 -10 extend into the bores 8--8, so that they will correspondingly extend i'ntothe' notches 9 of the plugs -7'when the knob sections 1 2 are fully assembled. {The hub of the locking plate 11 is prefer- "ably-provided with an angular passage, the sides of which coact with "one or more angular portions on the sleeve 12.

12 is a 'sleeve, whichis rotatably mounted on the inner end of the plug 5, and this sleeve has a squared portion,as shown in Fig. 14, adapted to .rests.

fit into the angular passage in the hub 11 of the locking plate. The innermost pin tumbler and its follower, indicated at 14, are intended to normally unlock the sleeve 12 from the plug 5 and to lock it to the cylinder, so that it will not turn with the plug when the latteris turned by the ordinary pass key 4, for the purpose of turning the spindle 6. When, however, it is desired to operate the locking plate 10, a diilerent key '15 is employed, which will operate all the tumblers, so as to not only release the plug 5, whereby :it may be turned in the cylinder, but so that it will lock the sleeve 12 to the plug and unlock it from the cylinder, whereby the sleeve12 will be'caused to turn with the plug. 10 is mounted on the sleeve 12,-1it-follows that, by the use of the longer key 15 the said locking plate may be rotated "su'fiiciently "to disconnect the locking ears l0 from the studs '77, thus unlocking the outer portion 2 of the knob, so that the latter may be withdrawn from the part 1 of the knob, which, of course, opens up the knob sothat the cylinder lock mechanism maybe easily removed from its-support, and another cylinder lock mechanism, adapted to be operated'onlyby a diiferentpasskey, may be substituted forythe first one. As is usual, the .pin housing 3 of the cylinder lo'ck may be'heldwithin the knob in any suitable-way, as by means of the usual lugs-16:16, between which it normally 10 is merely a stop plate, which may be screwed, or otherwise "secured, to the plate 10,

the purposebeing to-limit the rotative motion of said locking plate.

-Now,'summarizing.as to the aforesaid construction and its operation it 'will'be seen that when the parts-are assembled, as shown in Fig. 1, the

spindle-'6 may be turned'by an appropriate pass key 4. When itis desired'to change the cylinder lock for any reason, so'that a different passkey will be required to operate the spindle -6, it is necessary for the one in charge of the building to merely-use a special .master key, such as indicated at 15. 'When' this is inserted into the look, as shown in Fig. '5, it serves to move all of the variouszpins so thatthe sleeve 12 will be locked to the :plug and freedfrom'the cylinder.

Then, by turning the key 15, the plug, with the sleeve 12, will turn so that the locking plate 10 -may be backed oiI to aposition wherein the lockingears Ili 10 disengage the studs '7'7. The

outer section 2 of the knob may then'be .pulled outwardly in alongitudinaldirection. Then,by

removing the key 15, the cylinder lock may be removed and'another one substituted, designedto be operated'bya different pass key although, .of course, still being'operableby the special master :key'15.

When the new cylinder is applied it isfirsts slipped into place-in=the part l and the outer by an appropriate pass key.

While -I have shown and described herein a key-controlled device of thepin cylinder type,-in

:which a fla't key 'is employed, -my :invention is Since the locking plate not necessarily limited to that specific form of look, as other types might be employed, the main purpose being to provide in the construction of this look a key-controlled device within a hollow knob, accessible through theouter end oi the knob, whereby, by the use of one key, the lock mechanism, such as the spindle 6, may be operated under normal conditions, and whereby by the use of another key insertible into said device the knob locking mechanism may be actuated so that the knob may be separated to permit the key-controlled device to be changed or repaired,

as desired.

.I claim:

#1. ln a lock', a knob formed in two separable parts, one ,part having a shank to be mounted on a door, a cylinder look within said knob, and

:me'a'nsforlocking-andunlocking the parts of said cur-"ed to a door, said knob being form edin two separableparts, :a cylinder lock in :said -knob,a

plug therein, and'means.actuatedbysaid:plugfor lockingthe pttrts of said knob together.

4. In a look, a knob having ashank to be-secured to a door, said knob being formed intwo 5. Ina lock, a knob-having a' shankrto besecured to a-door, said knob being Pformedeintwo .parts separable relatively to each other in 'a "direction -longitudinal1of:said shank; a cylinder :lock

within' said knob andsupported between said: separable parts thereof, a plug therein, one "of. said knob .parts having -:a locking abutment thereon,

and :means actuated 'by said plug for .engbging 'said' locking 1 abutment to lock the :parts of maid knob together.

6. In ailock aknob havineavshank-tobe cured to a door, said s knob being formed mitwo relatively separable .parts, one of said jparrs having locking abutments-and: the other obsaidiparfls having means for receivingisaid locking abutments, a "cylinder lock within -said :knob, 2.3108 therein, and 'a locking imember' operable ,:by said .plugfor engaging.said locking-abutmlents forlocking theparts of saidkn'obtogetherior-hoidins said cylinder therein.

'7. In a look, a knob having 'a shank-timbe parts being freed by :a key, whereby said pits aparts 'may be rotated relatively to each other,

and means actuated by one ofithe: relatively movableparts of 'saidlplug for-looking the parts. of

said knob together for rholding :said cylinder therein.

8. In .a'lock; a hollowknobf-formed of twoioep- -ara'ble parts, a rotatablerkey operable deviee zletachably mounted within said knob and lnchlding a rotatablepart accessibledor a key at the outer'iend of said :knob andlmeansliorzlocklng I together the separable parts of said knob, said rotatable part coacting positively therewith to move said knob locking means to both look and unlock said separable knob parts.

9. In a look, a hollow knob formed of two separable parts, a rotatable key operable device detachably mounted within said knob and including a rotatable part accessible for a key at the outer end of said knob, and means for locking together the separable parts of said knob, said rotatable part coacting positively therewith to engage and disengage said knob locking means when one key is used, whereby said knob parts may be locked together or separated, said rotatable part being operable by a different key for a different purpose.

10. A hollow door knob, including two separable parts, locking means within the knob for engaging and disengaging said parts, and key operable means inside of said knob foroperating a door locking means under one condition and for operating the knob locking means under another condition. I V

11. A hollow door knob, including two separable parts, means for engaging said parts by a' longitudinal movement of one relativelyto the other, knob locking means within the knob to prevent longitudinal motion of the parts when assembled, door lock operating means also associated with said knob, and key-controlled means also within said knob and operable by one key to operate the door lock operating means and by another key to operate the knob locking means, said knob locking means including a movable piece carried by erate the door lock operating means and by another key to operate the knob locking means.

13. A hollow door knob, including two separable parts, means for causing said parts to be engageable and disengageable by a substantially longitudinal movement of one relatively to the other,

knob locking means within said knob to prevent said longitudinal movement of said knob parts when assembled, door lock operating means also associated with said knob, and key controlled means within said knob, operable under one condition to operate the door lock operating means and under another condition to operate the knob locking means.

14. In a look, a two-part separable knob, a lock mounted therein, means for locking the two parts of said knob together against separation, key controlled means to operate said knob locking means by the rotation of said key in said lock.

15. A hollow knob including two separable parts to permit a key operable lock mechanism to be inserted into and removed from the interior of said knob, means for locking said knob parts together against separation, and means movable by said lock mechanism and coacting with the means for locking said knob parts to operate the latter in one direction.

16. A hollow knob including two separable parts to permit a key operable lock mechanism to be inserted into and removed from the interior of said knob, means for locking said knob parts together against separation, and means movable by said lock mechanism and coacting with the means for locking said knob parts to operate the latter in both directions.

1'7. In a device of the character described, a cylinder lock. including a rotatable plug, a support formed of a plurality of interengaging parts for enclosing the cylinder but exposing the outer end of itsplug, locking means for said interengaging parts, means actuated by said plug for moving said locking means to and fro to lock and unlock said interengaging parts.

NORMAN B. HURD. 

